Sakarya Province (Turkis: Sakarya ili) is a province in Turkey, locatit on the coast o Black Sea. The river Sakarya creates a wabbin o estuaries in the province.

Sakarya is locatit in the Marmara Region. Its adjacent provinces are Kocaeli tae the wast, Bilecik tae the sooth, Bolu tae the sootheast, an Düzce tae the east. The caipital o Sakarya is Adapazarı. The climate is oceanic due tae its close proximity tae the Black Sea.